# BUBBLESORT
#
# Sorts an array by value from smaller to bigger.
#
# array - The array to be sorted.
#
# Examples
#
#    bubblesort([1, 4, 7, 6, 1])
#    # => [1, 1, 4, 7, 6, 1]
#
#    bubblesort([1, 3, 91, 51, 108])
#    # => [1, 3, 51, 91, 108]
#
# Returns the sorted array